This is the server component for the Bitcoin wallet Electrum's label synchronization feature.
There is a public node available at http://sync.bytesized-hosting.com/.
A Docker file is included in the repository. You can pull it using docker pull maran/electrum-sync-server and then start it using docker run -p 0.0.0.0:8080:8080 --rm -v $PWD:/data maran/electrum-sync-server. You can change $PWD to a folder where you want to save the database file on the host.
This project is 'go get(able)' install Go and do go get -u github.com/maran/electrum-sync-server.
Configuration happens via environment variables.
DBTYPE: Database to use, possible values sqlite3 or postgres.
DBDIR: Directory to use for sqlite3 database.
DBUSER: Postgres user
DBPASSWORD: Postgres password
PGHOST: Postgres hostname
PGDATABASE: Postgres database
LISTENPORT: Address to bind on. Format; ip:port